CN202673215U - Sand pump pipe string - Google Patents
Sand pump pipe string Download PDFInfo
- Publication number
- CN202673215U CN202673215U CN 201220236247 CN201220236247U CN202673215U CN 202673215 U CN202673215 U CN 202673215U CN 201220236247 CN201220236247 CN 201220236247 CN 201220236247 U CN201220236247 U CN 201220236247U CN 202673215 U CN202673215 U CN 202673215U
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- sand
- sand bucket
- pipe string
- seat
- loading cylinder
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Abstract
The utility model discloses a sand pump pipe string which overcomes the defect of frequent demounting of sand pumps of existing sand pump pipe strings. The sand pump pipe string comprises a sliding sleeve (2), an upper uniflow valve (3), a sand pump (4), a sand containing barrel (5) and a lower uniflow valve (6) in sequential connection. The sliding sleeve (2) comprises an opening and communicated with the outside through the opening. The upper uniflow valve (3) is off when pressure in the sand pump (4) and the sand containing barrel (5) is smaller than the external pressure and is on when the pressure in the sand pump (4) and the sand containing barrel (5) is larger than the external pressure. The sand containing barrel (5) serving as a counterweight comprises multiple oil pipes in connection. The sand pump pipe string is effective in sealing, long in service life and more reliable in use.
Description
Technical field
The utility model relates to the downhole petroleum instrument, relates in particular to a kind of sand bucket pipe string.
Background technology
At present, recover and the common method of keeping sand output well production is hydraulic sand washing.In the hydraulic sand washing process, often because the barrel blasting well bottom pressure, makes a large amount of sand cleaning fluids oil reservoir that bleeds greater than strata pressure, even partial product sand returns to oil reservoir, and oil reservoir is caused damage.In the oil-water well operation process, in debt and the oil-water well of severe leakage layer is arranged for the stratum, also there is the working fluid leakage phenomena during operation sand washing.This not only can injure the stratum, but also affects normally carrying out of workover treatment.
Existing sand bucket adopts cylindrical push rod, and when lower well operations was hampered, the unfreezing effect was bad.In the normal operation situation, very quick-wearing inefficacy of seal during the operation of continuous application sand bucket needs frequent dismounting sand bucket, changes seal, and operating cost is large, and duty cycle is long.In addition, utilize the sand washing of pump truck high flow rate washover, exist operating cost high, elapsed time is long, and working fluid returns the problems such as row's difficulty after the operation.And existing sand bucket pipe string exists in operation process that to drag for the sand amount few, plays lower tubular column often, and expense is high, drags for the sand effect undesirable, and success rate is lower, pipe string application life short and can't abolish sand grains cementing with the problem such as small falling object.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiency that present sand bucket pipe string needs frequent dismounting sand bucket.
In order to solve the problems of the technologies described above, the utility model provides a kind of sand bucket pipe string, comprises sliding sleeve (2), upper ball-and-seat (3), sand bucket (4), sand loading cylinder (5) and lower ball-and-seat (6) that order links to each other, wherein:
Sliding sleeve (2) includes opening, links by opening and outside; The pressure of upper ball-and-seat (3) in sand bucket (4) and sand loading cylinder (5) is closed during less than external pressure, opens during greater than external pressure; The pressure of lower ball-and-seat (6) in sand bucket (4) and sand loading cylinder (5) is closed during greater than external pressure, opens during less than external pressure; The sand loading cylinder (5) that serves as counterweight comprises the multiple-tubing string that is connected.
Preferably, sand loading cylinder (5) comprises six roots of sensation standard oil pipe.
Preferably, this sand bucket pipe string comprises,
Guide shoe (7) is connected to the two ends of lower ball-and-seat (6) with sand loading cylinder (5).
Preferably, sand bucket (4) comprises,
Stack shell (9) and be enclosed within the inner push rod (8) of stack shell (9), the endoporus of stack shell (9) is hexagonal cross-section, push rod (8) is the body of rod of hexagonal cross-section.
Preferably, in the sand bucket (4),
Be enclosed within on the piston (10) in the stack shell (9) wear ring (11) is installed.
Preferably, sliding sleeve (2) one ends connect upper ball-and-seat (3), other end connected pipes pipe nipple (1).
Compared with prior art, among the embodiment of the present utility model, sand bucket changes positive hexagonal prism push rod into by existing cylindrical push rod, so that sand bucket can transmitting torque, effectively abolishes cementing gravel.Embodiment of the present utility model has adopted the v-seal combination of novel high-quality, good sealing effect, and the life-span is long, uses more reliable.Embodiment of the present utility model can effectively abolish gravel when the sand bucket operation is hampered cementing, solves sand card problem, improves and drags for the sand success rate.
Description of drawings
Fig. 1 is the organigram of the sand bucket of the utility model embodiment.
Fig. 2 is the organigram of the sand bucket pipe string of the utility model embodiment.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, hereinafter in connection with accompanying drawing embodiment of the present utility model is elaborated.Need to prove, in the situation that do not conflict, the embodiment among the application and the feature among the embodiment be any combination mutually.
As shown in Figure 1, the sand bucket of the utility model embodiment mainly comprises push rod 8, stack shell 9, piston 10, wear ring 11 and V-seal spare 12 etc.Push rod 8 is enclosed within the inside of stack shell 9, and the endoporus of stack shell 9 is hexagonal cross-section, and push rod 8 is the body of rod of hexagonal cross-section.Push rod 8 and stack shell 9 cooperate can the effective communication moment of torsion.Be enclosed within on the piston 10 in the stack shell 9 wear ring 11 is installed, piston 10 is little with the frictional force of stack shell 9.
As shown in Figure 2, the sand bucket pipe string of the utility model embodiment mainly comprises sliding sleeve 2, upper ball-and-seat 3, sand bucket 4, sand loading cylinder 5, lower ball-and-seat 6 and the guide shoe 7 that order links to each other.
Sand loading cylinder 5 is mainly connected to form by multiple-tubing string, and for guaranteeing that sand bucket 4 naturally vertically being in the state of pulling open under the state, needs the sand loading cylinder to serve as counterweight, while oil pipe inner space is used for sand loading.It is large that the large capacity negative pressure sand bucket pipe string of the utility model embodiment drags for the sand amount, thereby sand loading cylinder 5 comprises six roots of sensation standard oil pipe and connects and make sand loading cylinder (among other embodiment, also can be the oil pipe of other quantity).
Sliding sleeve 2 includes opening, can be connected to pit shaft by this opening; The pressure of upper ball-and-seat 3 in sand bucket 4 and sand loading cylinder 5 is closed during less than external pressure, opens during greater than external pressure; The pressure of lower ball-and-seat 6 in sand bucket 4 and sand loading cylinder 5 is closed during greater than external pressure, opens during less than external pressure.Guide shoe 7 and sand loading cylinder 5 are connected to the two ends of lower ball-and-seat 6.Sliding sleeve 2 one ends connect upper ball-and-seat 3, other end connected pipes pipe nipple 1.
Embodiment of the present utility model installs wear ring 11 because the seal of sand bucket 4 has been selected on V-seal spare 12 and the piston 10 when entering well, piston 10 is little with the frictional force of stack shell 9.Sand bucket 4 is in extended state under the counterweight effect, continue to press down after entering sand bed.When the pipe string deepened continuously sand bed, sand bucket 4 shrank, and in the good situation of inner space sealing effectiveness, upper ball-and-seat 3 is opened, and the air in sand bucket 4 and the sand loading cylinder 5 is discharged to pit shaft from sliding sleeve 2, until sand bucket 4 all shrinks.
Cementing such as shaft bottom gravel, can turn to be rotated counterclockwise and manage string, because being hexagon, sand bucket push rod 8 and stack shell 9 endoporus cooperate, can the effective communication moment of torsion, drive guide shoe 7 rotations bottom of sand bucket pipe string, apply certain downforce, it is cementing that gravel will effectively be abolished in guide shoe 7 tips.
When taking out the sand operation, the upper lifting pipe string, because sand bucket part below 4 (also being sand loading cylinder 5, lower ball-and-seat 6 and guide shoe 7 etc.) counterweight is greater than the seal 12 in the sand bucket 4 and the frictional force between the stack shell 9, therefore sand bucket part below 4 keeps the former degree of depth motionless, sand bucket 4 is stretched out, itself and sand loading cylinder 5 inner confined spaces become large, pressure decreased, the pipe string forms negative pressure in two ends up and down relatively, upper ball-and-seat 3 still is in closed condition, but lower ball-and-seat 6 can be opened under pressure, and gravel and shaft bottom liquid enter sand loading cylinder 5.After sand bucket 4 is all stretched out, upper lifting force can strengthen suddenly, at this moment carry on stopping, begin to press down tubing string, lower ball-and-seat 6 is closed, and sand bucket 4 and sand loading cylinder 5 interior liquid rise, and upper ball-and-seat 3 can be opened, can by upper ball-and-seat 3 by counter being discharged in the pit shaft of sliding sleeve 2 openings, until shrinking, finish sand bucket when liquid is too much.
Repeatedly pull open and shrink sand bucket pipe string until find sand bucket during the upper lifting pipe post and no longer stretch out, at this moment the weight of carrying on beginning is very large, descends ball-and-seat not open, reach the sand loading upper limit in the sand loading cylinder.Trip out large capacity negative pressure sand bucket pipe string, get rid of gravel, check and clean tubing string, again subjob after reconnecting.The V-seal combining structure that sand bucket adopts guarantees that sand bucket telescopic process frictional force is little, and does not affect sealing performance.
Among the embodiment of the present utility model, the sealing ring that sand bucket adopts and the combination of v-seal spare, characteristics with the little while good sealing effect of frictional force cooperate the following counterweight of sand bucket, guarantee that sand bucket can be stretched out and inner formation negative pressure under the naturally vertical state of sand bucket pipe string.The sealing ring that sand bucket adopts and the sealing combination structure of v-seal spare have the self-shield ability, and reliability is strong, has prolonged the application life of seal.On the sand bucket piston wear ring is installed, the wear ring anti-wear performance that adopts the polytetrafluoroethylene (PTFE) material to make is good, effectively isolated Metal Contact, prevent mechanical shock, part injury when avoiding stretching out contractive action, wear ring has the centering effect simultaneously, guarantees that sand bucket is steadily reliable in the course of the work, thereby has greatly prolonged the sand bucket whole service life.
Among the embodiment of the present utility model, sand bucket up and down two ball-and-seats is used in conjunction with, and in pressing down process, upper ball-and-seat is opened discharge opeing, and lower ball-and-seat is closed; On be pulled through in the journey, upper ball-and-seat is closed sealing, forms negative pressure, lower ball-and-seat is opened into sand.In the situation that repeatedly put the pressure pipe post repeatedly, constantly use this action principle, until liquid storage body not in the sand loading cylinder, sand loading reaches the upper limit.The application of this structure can reach the effect that large capacity drags for sand, and less lower tubular column number of times saved operating cost.
Among the embodiment of the present utility model, sand bucket push rod cross section and stack shell inner hole section are orthohexagonal, adopt can drive guide shoe when tubing string rotates after this kind design and rotate, when dragging for sand and be hampered, rotate by guide shoe bottom and to abolish the cementing and broken little junk of sand grains, can prevent from meeting the card accident and occur.
Among the embodiment of the present utility model, the rubber seal that sand bucket adopts and the seal combination of v-seal spare, good sealing effect, reliability is strong, has prolonged the application life of potted component.
In running string process of embodiment of the present utility model, can repeated multiple timesly take out sand, sand grains is kept at the sand loading cylinder, liquid is counter to be discharged in the pit shaft, inhales sand effective, drags for the sand amount large, success rate is high, the low example structure of the present utility model of operating cost is reliable, and long service life can effectively be abolished the cementing and small falling object of gravel.
Although the disclosed embodiment of the utility model as above, the embodiment that described content just adopts for the ease of understanding the utility model is not to limit the utility model.Those of skill in the art under any the utility model; under the prerequisite that does not break away from the disclosed spirit and scope of the utility model; can do any modification and variation in the details that reaches of implementing in form; but scope of patent protection of the present utility model still must be as the criterion with the scope that appending claims was defined.
Claims (6)
1. a sand bucket pipe string is characterized in that, comprises sliding sleeve (2), upper ball-and-seat (3), sand bucket (4), sand loading cylinder (5) and lower ball-and-seat (6) that order links to each other, wherein:
Sliding sleeve (2) includes opening, links by opening and outside; The pressure of upper ball-and-seat (3) in sand bucket (4) and sand loading cylinder (5) is closed during less than external pressure, opens during greater than external pressure; The pressure of lower ball-and-seat (6) in sand bucket (4) and sand loading cylinder (5) is closed during greater than external pressure, opens during less than external pressure; The sand loading cylinder (5) that serves as counterweight comprises the multiple-tubing string that is connected.
2. sand bucket pipe string according to claim 1 is characterized in that,
Sand loading cylinder (5) comprises six roots of sensation standard oil pipe.
3. sand bucket pipe string according to claim 1 is characterized in that, this sand bucket pipe string comprises,
Guide shoe (7) is connected to the two ends of lower ball-and-seat (6) with sand loading cylinder (5).
4. sand bucket pipe string according to claim 1 is characterized in that, sand bucket (4) comprises,
Stack shell (9) and be enclosed within the inner push rod (8) of stack shell (9), the endoporus of stack shell (9) is hexagonal cross-section, push rod (8) is the body of rod of hexagonal cross-section.
5. sand bucket pipe string according to claim 1 is characterized in that, in the sand bucket (4),
Be enclosed within on the piston (10) in the stack shell (9) wear ring (11) is installed.
6. sand bucket pipe string according to claim 1 is characterized in that,
Sliding sleeve (2) one ends connect upper ball-and-seat (3), other end connected pipes pipe nipple (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220236247 CN202673215U (en) | 2012-05-24 | 2012-05-24 | Sand pump pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220236247 CN202673215U (en) | 2012-05-24 | 2012-05-24 | Sand pump pipe string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202673215U true CN202673215U (en) | 2013-01-16 |
Family
ID=47494126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220236247 Expired - Lifetime CN202673215U (en) | 2012-05-24 | 2012-05-24 | Sand pump pipe string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202673215U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661579A (en) * | 2017-03-27 | 2018-10-16 | 中国石油化工股份有限公司 | A kind of Telescopic continuous flushing device and method |
-
2012
- 2012-05-24 CN CN 201220236247 patent/CN202673215U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661579A (en) * | 2017-03-27 | 2018-10-16 | 中国石油化工股份有限公司 | A kind of Telescopic continuous flushing device and method |
| CN108661579B (en) * | 2017-03-27 | 2023-12-12 | 中国石油化工股份有限公司 | Telescopic continuous sand washing device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CHINA OILFIELD SERVICES Ltd. Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CHINA OILFIELD SERVICES Ltd. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130116 |